3
$\begingroup$

I want to impose symmetry plane boundary condition for a solid mechanics problem. I googled around and found out that in many places people say to "forbid displacemnts out of symmentry plane and forbid rotations about any axis lying in this plane if you have rotational degrees of freedom".

If I have only disps degrees of freedom, how do I do it right? If my simmetry plane is e.g. YZ then I need to set $u_x=0$. It's only one equation, I think I need three to match the number of equations and unknowns. What are the others (if any)?

Improve this question
$\endgroup$

1 Answer 1

Reset to default
2
$\begingroup$

The other two boundary conditions you need are \begin{equation} \frac{\partial u_y}{\partial x}=0;\quad \frac{\partial u_z}{\partial x}=0. \end{equation}

Thus the symmetry boundary condition is essentially identical to "rigid-smooth" boundary conditions.

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.